Aqueous fire-fighting foams with reduced fluorine content

Discloses is an aqueous film-firefighting composition concentrate comprising: (a) an effective amount of a monomeric C6 perfluoroalkyl surfactant having a structure represented by the formula I: Rf-X-Y-L-Z; wherein Rf is C6 straight or branched chain perfluoroalkyl; X is C2-C12 straight or branched chain alkylene, or C2-C12 straight or branched chain alkenylene containing 1 or 2 alkene moieties; Y, L and Z is selected from the group as defined in the specification; (b) an effective amount of a foam stabilizing agent, and (c) an effective amount of at least one non-fluorinated surfactant, wherein said composition has less than 0.8 % F, and is substantially free of any surfactant containing a perfluoroalkyl group containing more than 6 carbon atoms.